EP3426910A1

EP3426910A1 - Internally pressurized component (rail) and method for producing same

Info

Publication number: EP3426910A1
Application number: EP17710512.9A
Authority: EP
Inventors: Florian Renner; Thomas Sellmann; Florian Geiger
Original assignee: Hirschvogel Umformtechnik GmbH
Current assignee: Hirschvogel Umformtechnik GmbH
Priority date: 2016-03-11
Filing date: 2017-03-08
Publication date: 2019-01-16
Anticipated expiration: 2037-03-08
Also published as: EP3426910B1; DE102016204025A1; US10982636B2; WO2017153460A1; CN108779749B; CN108779749A; DE102016204025B4; US20190093614A1

Abstract

The present invention relates to a method for producing an internally pressurized component (1), having the steps of: providing a main body (2) with a longitudinal cavity (3) and with an attachment flange (6) for attachment of the internally pressurized component (1), providing a bolt (80), introducing a through-bore (7) that extends longitudinally through the attachment flange (6) and has two opposite openings (70, 71) with respect to the longitudinal axis (L7), inserting the bolt (80) into the through-bore (7) such that the bolt (80) is arranged flush with the attachment flange (6) on the side of one of the openings (70) and extends from this opening (70) through the through-bore (7) and through the other opening (71) in order to project from the attachment flange (6), materially bonding the bolt (80) to the attachment flange (6), and introducing a longitudinal bore (81) into the bolt (80) to form an attachment sleeve (8). The invention also relates to a corresponding internally pressurized component (1).

Description

Internal pressure loaded component (rail) as well

Process for its preparation

The present invention relates to an internal pressure-loaded component, in particular in the formation of a high-pressure fuel accumulator (rail), for example, for a common rail fuel injection system of an internal combustion engine, and to a method for producing such a component.

From the prior art, corresponding internal pressure-loaded components, in particular high-pressure fuel storage, known. These usually have one

Basic body with a longitudinal cavity or an elongated blind hole on.

The main body preferably further comprises at least one connecting flange also with an elongate bore which connects the longitudinal cavity to the outside, on.

A rail is part of a fuel injection system and serves to distribute the fuel pumped by the fuel pump to the individual cylinders of a

Internal combustion engine. Rails are usually made of steel and stainless steel in particular.

Such internal pressure loaded components usually have integral with the

Component body formed fasteners on to the

internal pressure loaded component, for example, to be attached to an engine block accordingly. This integrally formed with the main body fasteners have a through hole into which a fastening screw is inserted to screw the component to the engine block. A disadvantage of this configuration is the high weight, in particular the fastening elements, which is caused by the forging technology production, since, due to their integral design with the base body, they require correspondingly highly developed wall thicknesses and transition areas. This in turn results in a high

Material use and therefore in relatively high costs.

It is therefore an object of the present invention to provide a component subject to internal pressure and a method for the production thereof, which allow simple production with weight-optimized design of the component. This object is solved by the subject matter of the independent claims. The dependent claims further form the central idea of the invention in a particularly advantageous manner.

According to a first aspect, the present invention relates to a method for producing an internal pressure-loaded component, in particular in the formation of a high-pressure fuel accumulator (rail). This method has the following steps:

Providing a base body with a longitudinal cavity and with a fastening flange for fastening the component subjected to internal pressure,

Providing a bolt,

• Introduce yourself a long time through the mounting flange

extending through bore with two of the longitudinal axis opposite openings,

Inserting the bolt into the throughbore such that the bolt is positioned flush with the mounting flange on one side of the openings and extends from the opening through the throughbore and the other opening to protrude from the mounting flange;

• Material connection of the inserted into the through hole

Bolt with the mounting flange, and

• Inserting a longitudinal bore in the bolt to form a

Mounting sleeve.

By means of this method, a simple possibility for producing a component subjected to internal pressure with optimized weight is provided. The use of a bolt, which is inserted into a correspondingly provided bore and arranged in this materially connected to the mounting flange (eg. Welded), forms a secure and easy attachment for a corresponding fastener. The introduction of the Longitudinal drilling in the bolt can basically happen at any time; Thus, when providing the bolt, before or after the insertion of the bolt in the through hole, and also before or after the material connection of the bolt with the mounting flange. It is also conceivable that the longitudinal bore is introduced in several steps, which are carried out directly in succession or separately by other method steps. Thus, the longitudinal bore, for example, when providing the bolt introduced into this and after the material connection in a finishing or

Finishing step to be reworked. Thus, the mounting sleeve can be formed optimally geometric and material technology. she can

for example, be formed of a different material than the main body to be optimally designed for the requirements.

The bolt or the fastening sleeve can be inserted into the through hole substantially loosely, for example, preferably with a clearance fit. A transition fit is also conceivable. In particular, the insertion should be as simple as possible and safe - also with regard to an automated production - be possible. The throughbore may preferably be introduced such that it extends at least partially from one opening to the other opening (eg.

flared) to form an insertion bevel for the fastening sleeve or the bolt. In this case, the end of the fastening sleeve or of the bolt to be introduced or inserted can be extended to the through-hole and in particular to the

expandable region corresponding shape (eg, also conical) have. The foregoing can be the introduction especially in an automated

Simplify manufacturing. Also, the inserted bolt or the inserted mounting sleeve can abut at least in the region of an opening circumferentially on the inner wall of the through hole. Thus, it can be ensured that the bolt or the mounting sleeve after insertion and before the

cohesive bonding is held sufficiently secure in the longitudinal bore until sufficient for the operation of the component sufficiently secure and strong enough designed cohesive connection is provided. This facilitates the handling of the component during manufacture.

The cohesive connection can be provided circumferentially closed at least in the region of one opening and preferably the one opening. there For example, the step of integrally joining by means of welding and in particular laser welding can be carried out. By welding the bolt preferably only from the top by means of a laser, a quick and easy connection of the fastening sleeve or the bolt to the base or fastening flange is made possible, while at the same time providing a secure connection.

After the cohesive bonding, protruding areas of a weld thus formed can be removed from the fastening flange and in particular be milled away or ground away. Such processing - for example, over-milling - a weld is used in particular to prevent corrosion and also ensures a flat surface, for example, the support of a

Screw head of a fastening screw for mounting the internal pressure loaded component is used. At least one connecting flange can be provided on the main body with a passage opening which opens outwards and opens into the longitudinal cavity. In this case, the base body preferably together with the

Mounting flange and / or the connection flange integrally formed and preferably produced by forging. Generally speaking, preferred basic body with mounting flange and optionally also

Connection flange integrally formed with each other. In principle, it is also conceivable that fastening flange and / or connecting flange are materially connected to the base body, wherein this embodiment is less preferred than the integral training example. By means of forging.

In the context of the invention is a cohesive bonding - so that

Connecting several parts by means of cohesive manufacturing processes, such as welding, soldering and the like - to be distinguished from an integral design / training in which different parts of a component part in a single manufacturing process - such as forging or casting - are produced in one piece.

The through-bore and / or the longitudinal bore and / or the longitudinal cavity and / or the passage opening are preferably by means of cutting

Manufacturing processes, in particular drilling, milling, rubbing and / or honing, brought in. By using in particular the same machining production process, the manufacturing process can be further optimized.

The mounting sleeve is preferably at its the mounting flange

Milled opposite end flat. In this way, the mounting sleeve can be cut to a desired length. In addition, the assembly area of the internal pressure-loaded component facing side - so for example, the side with the mounting sleeves are placed on the engine block - be adapted to the geometric shape or orientation of the mounting area. Basically, it is also conceivable that the bolt before the Insertion of the longitudinal bore cut to length and preferably milled plan.

The aforementioned method can basically be carried out at least partially automated or semi-automatic, which further increases the effectiveness of the method.

According to a further aspect, the present invention further relates to an internal pressure loaded component itself, which is manufactured according to a method of the present invention.

In another aspect, the present invention relates to

internal pressure loaded component, in particular in the formation of a

High-pressure fuel accumulator (Rail), comprising a main body with a longitudinal cavity, a mounting flange for fixing the internal pressure-loaded component, wherein the mounting flange extending longitudinally through the mounting flange through hole with two with respect to the longitudinal axis

having opposite openings, and an inserted into the through hole mounting sleeve (ie incl. longitudinal bore, such as bolts with longitudinal bore), wherein the mounting sleeve is arranged on one side of the openings flush with the mounting flange and from this opening through the through hole and the other opening extends to protrude from the mounting flange. The mounting sleeve is with the

Fixing flange cohesively connected. In contrast to an integral design of the fastener with the body, the present invention is characterized by the cohesive joining of two components - body with mounting flange on the one hand and mounting sleeve / bolt on the other hand - in particular by a lower weight, which is particularly important in the automotive sector , In addition, a sufficiently strong and durable connection can be provided by means of a material connection, which also in operation

withstand occurring forces. By means of the flush alignment of the

Fixing sleeve with respect to the mounting flange may also preferably a surface as flat as possible to support, for example, a screw head of a fastening screw can be provided. In this case, the mounting flange can preferably on the side of an opening a support surface for just such a flange, in particular a screw head, a through the

Fastening sleeve extending fastener, in particular a fastening screw, for mounting the internal pressure loaded component. Since the fastening sleeve is inserted only in the through hole, also an easy introduction, for example, for an automated supply of mounting sleeve / bolt can be made possible; in particular compared to a clamping by providing an excess.

In a preferred embodiment, the internal pressure-loaded component made of steel and in particular made of stainless steel, which withstands, for example in the form of a rail the necessary for the fuel supply pressures. The fastening sleeve or the bolt can also be made of a different material, which in particular takes into account the requirements of the fastening function.

The fastening sleeve can be peripherally bonded to the fastening flange at least in the area of one opening and preferably the one opening. Thus, a secure connection between

Mounting sleeve and mounting flange provided. Since only one side of the corresponding cohesive connection must be provided, the internal pressure loaded component is also easy to manufacture. The cohesive connection can be formed by welding and in particular by laser welding. An appropriately produced cohesive

Compound is particularly advantageous for the preferred materials - such as stainless steel - for establishing a secure connection.

The cohesive connection and in particular a weld formed by welding can preferably be designed to overlap the fastening flange and the fastening sleeve. In this way, a secure cohesive connection is made possible.

The cohesive connection and in particular a weld formed by welding may, for example, have a depth of 2 to 10 mm, preferably 3 to 7 mm and particularly preferably 3.5 to 6 mm. Since deepened welds on the surface are permissible, in particular in the region of the weld, a particularly secure material connection can thus be provided.

Of course, the depth of the weld is basically dependent on the materials and dimensions of the components to be joined, so that the invention is not limited thereto.

The mounting sleeve is substantially loose - for example, with a clearance fit - or inserted with a transition fit into the through hole. Regardless of the additional provided cohesive connection thus can

Mounting sleeve - or as described in the above method, a corresponding bolt with or without a longitudinal bore - are simply inserted into the through hole to finally be welded accordingly with the mounting flange. In particular, the through hole (designed in this way) makes it possible for the fastening sleeve or a corresponding bolt to also be in front of it

cohesive connection of these components are simply assembled and also kept sufficiently secure until a later cohesive bonding without the fastening sleeve falling out of the through hole.

In a preferred embodiment, the through-hole widens at least partially from one opening to the other opening.

In particular, the through-hole may have an at least partially conical shape. In this way, the through hole can be a kind of insertion bevel for form the fastening sleeve or the bolt. That way, too

Assembling of fastening sleeve / bolt on the one hand with the

On the other hand, mounting flange are facilitated. Since the through-hole tapers toward the one opening, it can also be made possible, in particular in the preferred area for material-locking connection, to bring the connection partners together as close as possible in the area of the weld joint

cohesive connection of the two components a safe

To allow welded connection. In this case, for example, the fastening sleeve at least in the region of an opening circumferentially on the inner wall of the

Through hole abut. This also allows a centering of

Mounting sleeve with respect to the through hole and thus a defined positioning and orientation of the mounting sleeve or the bolt. The inserted end of the fastening sleeve or of the bolt can have - at least in the widening (conical) region of the through-bore - a corresponding to the through hole (eg conical) shape.

Preferably, the fastening sleeve, in particular their in the

Through hole introduced end, on the one hand and the through hole on the other hand, the same cross-sectional contour and in particular a corresponding shape, so that a secure recording of the mounting sleeve in the

Through hole and also a secure cohesive connection of these two connection partners is made possible.

Furthermore, the component subjected to internal pressure can have at least one connecting flange with a passage opening that opens outwards and opens into the longitudinal cavity. This connection flange or the passage opening connected to the longitudinal cavity ultimately serves to distribute, for example, into the

Longitudinal cavity conveyed fuel to the respective cylinder one

Internal combustion engine.

The main body and the mounting flange and, if available, the

Connecting flange are preferably formed integrally with each other. In particular, these components may be provided forged as an integrally formed component. Of course, the internal pressure loaded component also several

Fixing sleeves - for example four - have, each in a

Attachment flange used accordingly and are connected to this cohesively. In this case, each mounting sleeve can be assigned a separate mounting flange. However, it is also conceivable that at least some of the mounting flanges are integrally formed with each other, so that a mounting flange can accommodate a plurality of mounting sleeves accordingly.

In addition, it is conceivable that at least some of the connecting flanges and some of the mounting flanges are integrally formed with each other.

Further, the base body - especially in the embodiment of the component as a rail - one preferably integrally formed with the main body

Sensor connection flange, which provides for the provision of a pressure sensor

(For example, rail pressure sensor) is used.

Further embodiments and advantages of the present invention will be

explained in more detail with reference to the drawings of the accompanying figures. Like reference numerals are used for the same features. It shows:

Fig. 1 is a bottom view of a main body of an internal pressure-loaded component according to the invention with mounting flanges and

Connecting flanges prior to the introduction of through holes, which are shown here for illustrative purposes by dashed lines,

2 is a simplified cross-sectional view through the section II-II according to FIG l in the region of a through hole introduced here,

Fig. 3 is a side view of the main body according to Figure l with in the

Through holes inserted bolts,

4 shows a cross-sectional view along the section IV-IV according to FIG. 3 after a material-locking connection of the bolt (in this case without a longitudinal bore) to the fastening flange, Fig. 5 is a detail sectional view (right portion of the component of Figures l and 3) in plan view of the component according to the invention with

Cutting plane in the region of the flush arrangement of the bolt with the mounting flange and machined weld seam,

6 shows a lateral detail sectional view of the component subjected to internal pressure according to FIG. 5 after inserting a longitudinal bore in the bolt, and FIG. 7 shows another side detail sectional view (left portion of the component of FIGS. 1 and 3) starting from the component subjected to internal pressure according to FIG Figure 6 with cutaway mounting sleeve.

Figures 1 to 7 show different steps for producing a

According to the invention, the finished internal pressure-loaded component 1 is finally shown in particular in FIG. The component 1 can be designed in the form of a high-pressure fuel accumulator (rail), for example for a common rail fuel injection system of an internal combustion engine (for example an Otto or diesel engine), in particular for gasoline direct injection.

The internal pressure loaded component 1 is designed such that a fluid, such as a fuel, can flow through it under pressure. The component 1 may be made of metal; For example, made of aluminum or steel (especially stainless steel, such as stainless steel) or titanium. However, other materials are conceivable as long as they can withstand the pressure exerted on the component 1 pressure.

The component 1 has a main body 2 with a longitudinal cavity 3. The longitudinal cavity 3 is preferably unilaterally open seen in the longitudinal direction. About the thus formed unilateral opening 30 fuel can be promoted for example by means of a fuel pump in the longitudinal cavity 3 of the body 2. The longitudinal direction L2 is understood to mean the longitudinally elongate component 1 or main body 2. In the embodiment illustrated here, in particular for a rail, the main body 2 has at least one connecting flange 4. In the figures, a total of four connecting flanges 4 are shown. However, the number is not limited by the invention. The connection flange 4 can be provided, for example, for connecting a fluid-conducting element, such as a fuel line.

When used as a rail per cylinder, the component 1 preferably has the

associated internal combustion engine at least one connection flange 4. In addition to the connection flange 4 can also be a Sensoranschlussflansch S, as he

For example, shown in Figure 3, are provided. This can serve to provide a pressure sensor (for example, rail pressure sensor).

As can be seen in particular from FIG. 7, the connection flange 4 can have a passage opening 5 which is open towards the outside and opens into the longitudinal cavity 3. For example, when using the component 1 as a rail, fuel delivered via the opening 30 into the longitudinal cavity 3 can be further distributed to the (at least one, in this case four) connecting piece 4 via the passage openings 5 opening into the longitudinal cavity 3. At the connecting piece 4 or at the outwardly opening through opening 5, a fluid or.

Fuel guide, such as a fuel line, be connected to the conveyed through the rail fluid according to the cylinder of a

Distribute internal combustion engine and promote.

The component 1 furthermore has a fastening flange 6 for fastening the component 1. In the illustrated embodiment, the component 1 or the

Base 2 a total of four mounting flanges 6. However, the number of attachment flanges 6 is not limited. The mounting flanges 6 are preferably on two opposite sides of the body 1 with respect. Its

Longitudinal axis L2 and arranged distributed in the longitudinal direction thereof, wherein the

Distribution and arrangement is not limited by the invention. Rather, it is preferable to provide a weight-optimized and fastening-optimized arrangement of the mounting flanges 6.

As can be seen in particular from FIG. 1, at least some of the fastening flanges 6 may be integrally formed with some of the connecting flanges 4. This applies in the embodiment shown in the longitudinal direction of the Base body 2 seen in each case outside (here left and right) lying

Connecting flanges 4 and mounting flanges 6 to.

In a preferred embodiment, the main body 2 and the

Mounting flange 6 and, if present, and the connection flange 4 integrally formed with each other. In a preferred embodiment, the integral component is composed of base body 2, mounting flange 6 and optionally

Connection flange 4 made forged, but also other

Production methods (eg casting) are conceivable.

The mounting flange 6 has a longitudinally extending through the mounting flange 6 through hole 7. This can be seen in particular in FIG. The through hole 7 has two with respect to the longitudinal axis L7 of

Through hole 7 opposite openings 70, 71 on.

Furthermore, the component 1 furthermore has a bolt 80 (with longitudinal bore 81) or fastening sleeve 8 inserted into the through-hole 7. The fastening sleeve 8 is arranged on the side of one of the openings 70, 71 - in Figure 2, the upper opening 70 - flush with the mounting flange 6 and extends from this one opening 70 through the through hole 7 and the other opening 71 therethrough to from the Mounting flange 6 project, as shown in particular in Figure 6 and 7. By the projection of the

Mounting sleeve 8, the component 1 in a defined position on an associated component - such as an engine block - are mounted.

As shown in detail in Figure 4, the mounting sleeve 8 - here still shown as a bolt 80 without longitudinal bore 81 - be materially connected to the mounting flange 6. Since the fastening sleeve 8 is preferably inserted only substantially loosely (for example with a clearance fit) or with a transition fit into the through-hole 7 for easy insertion into the through-hole 7, the additional cohesive connection 9 provides a sufficiently secure and strong

Connection of the two components base body 2 and mounting flange 6 on the one hand and mounting sleeve 8 on the other hand provided. As can likewise be seen from FIG. 4, the fastening sleeve 8 can be connected to the fastening flange 6 at least in the area of one opening 70-in this case the upper opening-and preferably the one opening 70 closed

be connected cohesively. For example, by an appropriate

Weld 9, a particularly secure and the requirements of strong connection of the two components 2, 6, 8 are made possible. The cohesive connection 9 is formed in particular by welding and preferably laser welding. The cohesive connection 9,

In particular, a weld seam 9 formed by welding is preferably designed to overlap the fastening flange 6 and the fastening sleeve 8, as can be seen in FIG. The cohesive connection 9 and in particular a welded seam 9 formed by welding can have a depth X of 2 to 10 mm, preferably 3 to 7 mm and particularly preferably 3.5 to 6 mm, these dimensions not being limited by the invention and in particular by the Geometry and dimension and also the materials used

used components depends.

As can be seen from FIG. 4, recessed welds on the surface are thus permissible in the region of the weld seam 9, which consequently leads to a particularly stable connection of the fastening sleeve components 8 on the one hand and the mounting flange 6 on the other hand.

In a preferred embodiment, the through hole 7 can expand from one opening 70 to the other opening 71, thus a

Insertion bevel for the mounting sleeve 8 and the bolt 80 to form. The through hole 7 preferably has a total or at least partially - preferably on the side of the opening 70 - a conical shape. The

Fixing sleeve 8 and a corresponding pin 80 is this preferably from the other side 71 in the direction of an opening 70 in the

Through hole 7 introduced until the correspondingly introduced end 82 of mounting sleeve 8 and bolt 80 is correspondingly flush (up here flush) with the mounting flange 9 is arranged to be subsequently connected to each other materially. This geometric configuration of the through hole 7 thus also enables a simplified automatic feeding of a / a In a preferred embodiment, the end 82 to be introduced or inserted into the through-bore 7 - at least in the widening region thereof

- have corresponding shape; So, for example, also be conical.

In a preferred embodiment, the fastening sleeve 8 is located at least in the region of one opening 70 - that is, the opening 70, on which preferably the

cohesive connection 9 is provided - on the inner wall 72 of

Through hole 7 at. In this way it is ensured that, in particular in the region of the weld joint - ie in the region of an opening 70 - the

Mounting sleeve 8 (or bolt 80) on the one hand and the mounting flange 6 on the other hand sufficiently close - for example in the form of a game or

Transitional fit - are guided together to form a sufficiently secure cohesive connection 9.

In a preferred embodiment, fastening sleeve 8 or bolt 80

- Especially their introduced into the through hole 7 end 82 - and the through hole 7, the same cross-sectional contour and in particular a corresponding shape. The cross-sectional contour is preferably round and the shape is preferably cylindrical or conical, the invention not being limited to such embodiments.

As can be seen in particular from FIGS. 5 to 7, the fastening flange 6 has a bearing surface 60 on the side of an opening 70 for a flange region, in particular a screw head, of a fastening element extending through the fastening sleeve 8, in particular a fastening screw for mounting the internal pressure-loaded component 1. Thus, a secure support and thus defined attachment of the component 1 can be provided at a corresponding mounting area.

In the following, a method according to the invention for producing an internal pressure-loaded component 1 according to the present invention will be described.

In a first step, first a base body 2 with a longitudinal cavity 3 and with a mounting flange 6 for fastening the internal pressure loaded Component l provided. Such a basic body 2 is shown for example in FIG. Furthermore, a bolt 8o, as shown for example in FIGS. 3 and 4, is provided. The bolt 80 may be provided in this or a later method step with a longitudinal bore 81 to a

Form mounting sleeve 8.

At least one connecting flange 4 can be provided on the base body 2. This connection flange 4 preferably has an outwardly open passage opening 5 opening into the longitudinal cavity 3.

In a further step, a through hole 7 extending longitudinally through the fastening flange 6 is introduced into the fastening flange 6, such that these two are aligned with respect to the longitudinal axis L7 of the

Mounting flange 6 opposite openings 70, 71 has. This is shown in FIG. Both the through-hole 7 and the longitudinal bore 81 as well as the longitudinal cavity 3 and the through-opening 5 can be introduced by means of machining production processes, in particular drilling, milling, rubbing and / or honing. Furthermore, the main body 2, preferably together with the

Mounting flange 6 and / or the connection flange 4, integrally formed and produced for example by means of forging.

In a further step, the bolt 80 is inserted into the through hole 7 such that the bolt 80 on one side of the openings - here the upper

Opening 70 - is arranged flush with the mounting flange 6, and extends from this opening 70 through the through hole 7 and the other opening 71 to project from the mounting flange 6. This is shown in particular in FIG. Especially with widening (eg.

conical) configuration of the through hole 7 from the one opening 70 to the other opening 71 toward - and possibly with a corresponding shape of the inserted end 82 - can at introduction of the bolt 80 on the expanded area - here the opening 71 - in the through hole 7 a easy insertion of the bolt 70 are made possible in the through hole 7. this in turn also allows easy automatic feeding of the bolt 80 in the

Through hole 7.

The bolt 80 is inserted into the through-hole 7 in such a way that it is essentially loose (preferably with a clearance fit) or else with a clearance

Transition fit is inserted into the through hole 7. In this case, depending on the design of the through hole 7 (and possibly corresponding configuration of the inserted end 82), the bolt 80 at least in the region of an opening 70 preferably rest circumferentially on the inner wall 72 of the through hole 7. In this way it can be ensured that a once inserted bolt 80 does not readily fall out until a subsequent connecting step with the fastening flange 6, that is to say for example by gravity. However, by the quite "loose" connection between bolt 80 on the one hand and

Mounting flange 6 on the other hand, a particularly simple insertion of the bolt 80 are made possible.

In a further step, the bolt with the mounting flange. 6

cohesively connected. The cohesive connection 9 is thereby preferably provided closed at least in the region of the one opening 70 and preferably the opening 70. The step of cohesive bonding is preferably carried out by means of welding and in particular by means of laser welding. The preferred one-sided (here from above) implementation of such a welding method allows a particularly simple and at the same time secure provision of such a connection. This can be seen for example in FIG. 4.

Optionally, after the cohesive bonding 9 of the

Mounting flange 6 projecting portions of a resulting weld 9 are removed in a subsequent step. In particular, these areas can be removed for example by means of milling or grinding, for example, thus also a flat support surface 60 - as previously described - to form. This step is shown for example in FIG.

The further step for introducing a longitudinal bore 81 into the bolt 8 to form a fastening sleeve 8 may preferably also follow the step be carried out for cohesive connection 9. It is also conceivable that the introduction of the longitudinal bore 81 - as otherwise also every other step for providing a bore 3, 81, 7, 5 - is carried out separately in several steps directly after one another or else by other method steps.

For example, initially a corresponding bore 7, 81, 3, 5 introduced and these are finished in subsequent finishing steps.

In principle, therefore, it is also conceivable that the solid material pin 80 is provided during the provision equal to a longitudinal bore 81 / is to, as

corresponding mounting sleeve 8 to be provided. By means of this

Mounting sleeve 8 are then the steps described above - ie the

Inserting the mounting sleeve 80 in accordance with the through hole 7 and the cohesive bonding of the mounting sleeve 8 with the mounting flange 6 - performed.

In a further step, the bolt 80 or the fastening sleeve 8 can be cut to length at its end 83 opposite the fastening flange 6 and preferably milled to finally reduce the fastening sleeve 8 or bolt 80 to a desired length and with a corresponding orientation or Contour to provide, which corresponds to that of the corresponding mounting area to allow safe mounting on the mounting sleeves 8, for example, on an engine block.

The method as described above can be performed at least partially automated or semi-automated.

In particular, the present invention also includes an internal pressure loaded component 1, which was produced by a method according to the present invention.

The present invention is not limited to the above-described embodiment insofar as it is encompassed by the subject matter of the following claims.

In particular, the present invention is not limited to corresponding materials, dimensions or geometric configurations of the individual components. Also, the number is, for example, of mounting flanges 6, Connecting flanges 4 and mounting sleeves 8 are not limited by the invention.

Claims

claims

Method for producing an internal pressure-loaded component (1), in particular in the form of a high-pressure fuel accumulator (rail), comprising the following steps:

• Providing a base body (2) with a longitudinal cavity (3) and with a mounting flange (6) for fixing the

internal pressure loaded component (1),

Providing a bolt (80),

Inserting a through bore (7) extending longitudinally through the attachment flange (6) with two openings (70, 71) opposite to the longitudinal axis (L7),

Inserting the pin (80) into the through hole (7) such that the pin (80) is flush with the side of one of the openings (70)

Mounting flange (6) is arranged and extends from this opening (70) through the through hole (7) and the other opening (71) through to protrude from the mounting flange (6),

• cohesive connection of the bolt (80) with the mounting flange (6), and

• Inserting a longitudinal bore (81) in the bolt (80) to form a fastening sleeve (8).

A method according to claim 1, wherein the bolt (80) or the

Fixing sleeve (8) substantially loose, preferably with a

Game fit, or with a transition fit in the through hole (7) is used.

The method of claim 1 or 2, wherein the inserted bolt (80) or the inserted mounting sleeve (8) at least in the region of an opening (70) circumferentially on the inner wall (72) of the through hole (7).

Method according to one of the preceding claims, wherein the

cohesive connection (9) at least in the region of an opening (70) and preferably the opening (70) is provided closed circumferentially. Method according to one of the preceding claims, wherein the step of the material-locking connection by means of welding, in particular laser welding, is performed.

Method according to one of the preceding claims, wherein after the integral connection of the mounting flange (6) projecting areas of a resulting weld (9) removed, in particular weggefräst or ground away, become.

Method according to one of the preceding claims, wherein on the base body (2) at least one connecting flange (4) with an outwardly open and in the longitudinal cavity (3) opening through opening (5) is provided.

Method according to one of the preceding claims, wherein the

Base body (2), preferably together with mounting flange (6) and / or the connecting flange (4), integrally formed and preferably produced by means of forging.

Method according to one of the preceding claims, wherein the

Through hole (7) and / or the longitudinal bore (81) and / or the longitudinal cavity (3) and / or the passage opening (5) by means of machining production process, in particular drilling, milling, rubbing and / or honing introduced.

10. The method according to any one of the preceding claims, wherein the bolt (80) or the fastening sleeve (8) at its / its the mounting flange (6) opposite end (83) cut to length and preferably milled plan.

11. The method according to any one of the preceding claims, wherein the method is carried out at least partially automated or semi-automated.

12. internal pressure loaded component (l), in particular in the formation of a

High-pressure fuel accumulator (rail), produced by a method according to one of the preceding claims.

13. Innendruckbelastetes component (1), in particular in the formation of a

High-pressure fuel accumulator (Rail), comprising

a main body (2) having a longitudinal cavity (3),

a mounting flange (6) for fixing the internal pressure loaded component (1), wherein the mounting flange (6) has a longitudinally through the mounting flange (6) extending through hole (7) with two with respect to the longitudinal axis (L7) opposite openings (70, 71) , and

a fastening sleeve (8) inserted into the through-hole (7), the fastening sleeve (8) being arranged flush with the fastening flange (6) on the side of one of the openings (70) and extending from the opening (70) through the through-hole (7) and the other opening (71) extends to protrude from the mounting flange (6),

wherein the fastening sleeve (8) with the mounting flange (6) is integrally connected.

14. internal pressure loaded component (1) according to claim 12 or 13, wherein the

Fixing sleeve (8) with the mounting flange (6) at least in the region of an opening (70) and preferably the one opening (70) closed circumferentially cohesively connected.

15. internal pressure loaded component (1) according to one of claims 12 to 14, wherein the cohesive connection (9) by welding, in particular

Laser welding, is formed. 16. internal pressure loaded component (1) according to one of claims 12 to 15, wherein the cohesive connection (9), in particular a weld formed by welding (9), the mounting flange (6) and the

Fixing sleeve (8) is formed overlapping.

17. internal pressure loaded component (1) according to one of claims 12 to 16, wherein the cohesive connection (9), in particular a weld formed by welding (9), a depth of 2 to 10mm, preferably 3 to 7mm, and more preferably 3 , 5 to 6mm.

18. internal pressure loaded component (1) according to any one of claims 12 to 17, wherein the fastening sleeve (6) is inserted substantially loosely, preferably with a clearance fit, or with a transition fit in the through hole (7).

19. internal pressure loaded component (1) according to any one of claims 12 to 18, wherein the through hole (7) from one opening (70) to the other opening (71) expands, preferably flared to a

Insertion be made for the mounting sleeve (8).

20. internal pressure loaded component (1) according to one of claims 12 to 19, wherein the fastening sleeve (8) at least in the region of an opening (70) circumferentially on the inner wall (72) of the through hole (7). 21. internal pressure loaded component (1) according to any one of claims 12 to 20, wherein the fastening sleeve (8), in particular its in the through hole (7) inserted end (82), and the through hole (7) the same

Cross-sectional contour and in particular have a corresponding shape.

22. internal pressure loaded component (1) according to one of claims 12 to 21, further comprising at least one connection flange (4) with an outwardly open and in the longitudinal cavity (3) opening through opening (5). 23. internal pressure loaded component (1) according to one of claims 12 to 22, wherein the base body (2) and the mounting flange (6) and, if present, the connecting flange (4) are integrally formed with each other, preferably forged as an integral component.

24. Innendruckbelastetes component (1) according to any one of claims 12 to 23, wherein the mounting flange (6) on the side of an opening (70) a

Support surface (60) for a flange, in particular a

Screw head, one of the fastening sleeve (8) extending through fastener, in particular one

Fastening screw, for mounting the internal pressure-loaded component (1).